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Costain GroupCTNGY 59 PB Ratio is 1.27 as of Jul. 14, 2026, which is 11% above its 10-year median of 1.14. GuruFocus rates CTNGY with a GF Score™ of 59/100 and a GF Value™ of $1.23. The stock has 5 warning signs investors should review. Among 1,719 Construction companies, Costain Group ranks worse than 67.54% on this metric.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. As of today (2026-07-14), Costain Group's share price is $3.30. Costain Group's Book Value per Share for the quarter that ended in Dec. 2025 was $2.59. Hence, Costain Group's PB Ratio of today is 1.27.
Warning Sign:
Costain Group PLC stock PB Ratio (=2.16) is close to 5-year high of 2.24.
The historical rank and industry rank for Costain Group's PB Ratio or its related term are showing as below:
CTNGY'
s PB Ratio Range Over the Past 10 Years
Min: 0.24 Med: 1.14 Max: 5.1
Current: 2.16
During the past 13 years, Costain Group's highest PB Ratio was 5.10. The lowest was 0.24. And the median was 1.14.
CTNGY's PB Ratio is ranked worse than 67.54% of 1719
companies
in the Construction industry
Industry Median: 1.32
vs CTNGY: 2.16
During the past 12 months, Costain Group's average Book Value Per Share Growth Rate was 10.40% per year.
During the past 3 years, the average Book Value Per Share Growth Rate was 8.00% per year.
During the past 5 years, the average Book Value Per Share Growth Rate was 9.80% per year.
During the past 10 years, the average Book Value Per Share Growth Rate was -4.10% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Costain Group was 64.70% per year. The lowest was -67.90% per year. And the median was 1.10% per year.
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
Costain Group PB Ratio Related Terms
Costain Group PB Ratio Historical Data
* Premium members only.
The historical data trend for Costain Group's PB Ratio can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
For the Engineering & Construction subindustry, Costain Group's PB Ratio, along with its competitors' market caps and PB Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Costain Group PB Ratio vs Construction Industry
For the Construction industry and Industrials sector, Costain Group's PB Ratio distribution charts can be found below:
* The bar in red indicates where Costain Group's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
Costain Group's PB Ratio for today is calculated as follows:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
Costain Group (CTNGY) has a PB Ratio of 1.27 as of Jul. 14, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Costain Group and its competitors. This is 11% above median its historical median of 1.14. Over the past decade, Costain Group's PB Ratio has ranged from 0.24 to 5.10. According to the industry distribution chart, Costain Group ranks #1161 out of 1719 companies in the Construction industry, placing it in the top 67.5%.
Is Costain Group's PB Ratio too high?
Costain Group's current PB Ratio of 1.27 is 11% above median its 10-year median of 1.14. Over the past 10 years, this metric has ranged from a low of 0.24 to a high of 5.10. The Construction industry median PB Ratio is 1.32. Costain Group's value of 1.27 is 3.8% below this industry median. Based on the distribution chart, Costain Group ranks #1161 out of 1719 companies in the Construction industry, which is below the industry midpoint. Overall, Costain Group has a GF Score™ of 59/100, reflecting its overall financial health beyond just this single metric.
How does Costain Group's PB Ratio compare to PWR and FIX?
According to the Construction industry distribution chart, Costain Group ranks #1161 out of 1719 companies for PB Ratio. This places Costain Group in the lower half of its industry. The industry median PB Ratio is 1.32. Costain Group's value of 1.27 is 3.8% below this benchmark. Historically, Costain Group's own PB Ratio has ranged from 0.24 to 5.10 over the past decade. While the company's 10-year median is 1.14 vs. the industry median of 1.32, Costain Group has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good PB Ratio for a Construction company?
The median PB Ratio among Construction companies is 1.32, based on 1,719 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Costain Group's current PB Ratio of 1.27 is 3.8% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Costain Group and its competitors. For the Construction industry, the median PB Ratio is 1.32 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Costain Group's current PB Ratio is 1.27, which is 11% above median its own 10-year median of 1.14. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Costain Group stock overvalued right now?
Costain Group (CTNGY) has a current PB Ratio of 1.27. The stock's GF Value™ is $1.23, compared to a current price of $3.30 — trading 168.3% above its estimated fair value. The current PB Ratio is 1.27, which is 11% above median its 10-year median of 1.14 and 3.8% below the Construction industry median of 1.32. Costain Group's overall GF Score™ is 59/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For Costain Group (CTNGY), the current PB Ratio is 1.27 as of Jul. 14, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Costain Group (CTNGY) Overvalued in 2026?
Based on GuruFocus' analysis, Costain Group stock appears to be overvalued.
The current stock price of $3.30 is trading 168.3% above its estimated GF Value™ of $1.23.
Key valuation signals for CTNGY:
PB Ratio: 1.27 (11% above median its 10-year median of 1.14)
GF Value™: $1.23 vs. price of $3.30 (168.3% above fair value)
Industry Position: 3.8% below the Construction median (#1161 of 1719)
No single metric tells the full story. See the CTNGY stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Costain Group PLC offers solutions and services. It provides engineering and technology solutions and advisory and development, design, management, project delivery, technology integration and asset optimization and support services to highways, nuclear, oil and gas, power, water sectors, rail. The company has two segments Transportation and Natural resources. The transportation segment covers highways, rail, and nuclear markets and the Natural resources segment comprises of water, power and oil and gas markets. Majority of revenue is from Transportation Segment.
59GF Score
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